$700 for the return journey ?
My answer would still be NO on the 777 I am afraid
Same seat width as Economy 17.8 inches and an extra 6 inches of Seat Pitch.
Small cramped cabin with 3-3-3 seating
Bassinet row directly behind the cabin, can easily be heard, although noise cancelling headsets fix that
Bassinet row also the first row of Premium Economy, so you can end up right between two crying babies, and that happend to me from Auckland to Melbourne.
Yes you get better food and wine etc, but that's all your paying for.
Prority boarding as wel if that really matters...